I use 105grs of H4831SC in my Ruger RSM and get 2510fps avg. with a 400gr Hornady soft.

106grs of H4831SC gives me just over 2600fps with a 370gr Northfork soft loaded to the same OAL.

Try 90.2gr of IMR 4350. I get 2375 ou tof my 24" Ruger Rigby. Fed 215 M primers and norma brass. Jorge